"airquality" <-
structure(list(Ozone = c(41, 36, 12, 18, NA, 28, 23, 19, 8, NA, 7,
16, 11, 14, 18, 14, 34, 6, 30, 11, 1, 11, 4, 32, NA, NA, NA, 23,
45, 115, 37, NA, NA, NA, NA, NA, NA, 29, NA, 71, 39, NA, NA, 23,
NA, NA, 21, 37, 20, 12, 13, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, 135, 49, 32, NA, 64, 40, 77, 97, 97, 85, NA, 10, 27, NA, 7,
48, 35, 61, 79, 63, 16, NA, NA, 80, 108, 20, 52, 82, 50, 64, 59,
39, 9, 16, 78, 35, 66, 122, 89, 110, NA, NA, 44, 28, 65, NA, 22,
59, 23, 31, 44, 21, 9, NA, 45, 168, 73, NA, 76, 118, 84, 85, 96,
78, 73, 91, 47, 32, 20, 23, 21, 24, 44, 21, 28, 9, 13, 46, 18, 13,
24, 16, 13, 23, 36, 7, 14, 30, NA, 14, 18, 20), Solar.R = c(190,
118, 149, 313, NA, NA, 299, 99, 19, 194, NA, 256, 290, 274, 65,
334, 307, 78, 322, 44, 8, 320, 25, 92, 66, 266, NA, 13, 252, 223,
279, 286, 287, 242, 186, 220, 264, 127, 273, 291, 323, 259, 250,
148, 332, 322, 191, 284, 37, 120, 137, 150, 59, 91, 250, 135, 127,
47, 98, 31, 138, 269, 248, 236, 101, 175, 314, 276, 267, 272, 175,
139, 264, 175, 291, 48, 260, 274, 285, 187, 220, 7, 258, 295, 294,
223, 81, 82, 213, 275, 253, 254, 83, 24, 77, NA, NA, NA, 255, 229,
207, 222, 137, 192, 273, 157, 64, 71, 51, 115, 244, 190, 259, 36,
255, 212, 238, 215, 153, 203, 225, 237, 188, 167, 197, 183, 189,
95, 92, 252, 220, 230, 259, 236, 259, 238, 24, 112, 237, 224, 27,
238, 201, 238, 14, 139, 49, 20, 193, 145, 191, 131, 223), Wind =
c(7.4, 8, 12.6, 11.5, 14.3, 14.9, 8.6, 13.8, 20.1, 8.6, 6.9, 9.7,
9.2, 10.9, 13.2, 11.5, 12, 18.4, 11.5, 9.7, 9.7, 16.6, 9.7, 12,
16.6, 14.9, 8, 12, 14.9, 5.7, 7.4, 8.6, 9.7, 16.1, 9.2, 8.6, 14.3,
9.7, 6.9, 13.8, 11.5, 10.9, 9.2, 8, 13.8, 11.5, 14.9, 20.7, 9.2,
11.5, 10.3, 6.3, 1.7, 4.6, 6.3, 8, 8, 10.3, 11.5, 14.9, 8, 4.1,
9.2, 9.2, 10.9, 4.6, 10.9, 5.1, 6.3, 5.7, 7.4, 8.6, 14.3, 14.9,
14.9, 14.3, 6.9, 10.3, 6.3, 5.1, 11.5, 6.9, 9.7, 11.5, 8.6, 8, 8.6,
12, 7.4, 7.4, 7.4, 9.2, 6.9, 13.8, 7.4, 6.9, 7.4, 4.6, 4, 10.3, 8,
8.6, 11.5, 11.5, 11.5, 9.7, 11.5, 10.3, 6.3, 7.4, 10.9, 10.3, 15.5,
14.3, 12.6, 9.7, 3.4, 8, 5.7, 9.7, 2.3, 6.3, 6.3, 6.9, 5.1, 2.8,
4.6, 7.4, 15.5, 10.9, 10.3, 10.9, 9.7, 14.9, 15.5, 6.3, 10.9, 11.5,
6.9, 13.8, 10.3, 10.3, 8, 12.6, 9.2, 10.3, 10.3, 16.6, 6.9, 13.2,
14.3, 8, 11.5), Temp = c(67, 72, 74, 62, 56, 66, 65, 59, 61, 69,
74, 69, 66, 68, 58, 64, 66, 57, 68, 62, 59, 73, 61, 61, 57, 58,
57, 67, 81, 79, 76, 78, 74, 67, 84, 85, 79, 82, 87, 90, 87, 93,
92, 82, 80, 79, 77, 72, 65, 73, 76, 77, 76, 76, 76, 75, 78, 73,
80, 77, 83, 84, 85, 81, 84, 83, 83, 88, 92, 92, 89, 82, 73, 81,
91, 80, 81, 82, 84, 87, 85, 74, 81, 82, 86, 85, 82, 86, 88, 86,
83, 81, 81, 81, 82, 86, 85, 87, 89, 90, 90, 92, 86, 86, 82, 80,
79, 77, 79, 76, 78, 78, 77, 72, 75, 79, 81, 86, 88, 97, 94, 96,
94, 91, 92, 93, 93, 87, 84, 80, 78, 75, 73, 81, 76, 77, 71, 71,
78, 67, 76, 68, 82, 64, 71, 81, 69, 63, 70, 77, 75, 76, 68),
Month = c(5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9), Day = c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 1,
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
29, 30, 31, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)), row.names
= c("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
"24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34",
"35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45",
"46", "47", "48", "49", "50", "51", "52", "53", "54", "55", "56",
"57", "58", "59", "60", "61", "62", "63", "64", "65", "66", "67",
"68", "69", "70", "71", "72", "73", "74", "75", "76", "77", "78",
"79", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89",
"90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "100",
"101", "102", "103", "104", "105", "106", "107", "108", "109",
"110", "111", "112", "113", "114", "115", "116", "117", "118",
"119", "120", "121", "122", "123", "124", "125", "126", "127",
"128", "129", "130", "131", "132", "133", "134", "135", "136",
"137", "138", "139", "140", "141", "142", "143", "144", "145",
"146", "147", "148", "149", "150", "151", "152", "153"), class =
"data.frame")